This adds a tracepoint to trace the KVM_SET_USER_MEMORY_REGION ioctl parameters which is quite useful for debugging VFIO memory regions being actually registered with KVM.
Signed-off-by: Alexey Kardashevskiy <[email protected]> --- accel/kvm/kvm-all.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index f290f48..b91fcb7 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -235,6 +235,7 @@ static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) { KVMState *s = kvm_state; struct kvm_userspace_memory_region mem; + int ret; mem.slot = slot->slot | (kml->as_id << 16); mem.guest_phys_addr = slot->start_addr; @@ -248,7 +249,10 @@ static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot) kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); } mem.memory_size = slot->memory_size; - return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + ret = kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem); + trace_kvm_set_user_memory(mem.slot, mem.flags, mem.guest_phys_addr, + mem.memory_size, mem.userspace_addr, ret); + return ret; } int kvm_destroy_vcpu(CPUState *cpu) -- 2.11.0
